Used definition is - employed in accomplishing something. 96% of the cores cross section conducts modulated light for data transmission similar to glass optical fiber applications. Ask Questions, Get Answers Menu X. home ask tuition questions practice papers mobile tutors pricing Carbohydrates in food can take the form of sugars, starches, and fiber.Use Benedict's solution to test for simple sugars, such as fructose or glucose. However the other did not shrink on burning. Across. Acrylic fibres can be dyed with cationic dyes, anionic dyes or disperse dyes. They are used in aircraft structures and in high performance sporting equipment like golf clubs, tennis rackets and rowing boats, and are increasingly being used instead of metals to repair or replace damaged bones. Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics.. The fibres obtained from animals are made up of, Which of these fibres is non – biodegradable, The process of twisting fibres to make yarn is called a. India b. America c. Spinning. Fill in the blanks to complete the life story of cotton fibre. A fairly high degree of twist p… Man-made fibres such as viscose (rayon) or lyocell are based on cellulosic raw material, normally from wood pulp. Natural fabrics have been used for clothing since ancient times. Acrylic fibres are less flammable than cotton but more flammable than polyester and wool. They are cheaper than compared to natural fibres. Explain how fibres are obtained from the jute plants. Dietary fibre used to be known as ‘roughage’, and refers to a group of substances in plant foods which cannot be completely broken down by human digestive enzymes. Synthetic fibres are man-made fibres produced from chemical substances and are used for making clothes and other useful things. As carbon fibre is much more expensive than glass fibre, glass fibre is the first choice for home made composites. There are many different types of polyester but all of them are produced by condensation reaction and they all contain ester functional group COO. (d) The term "manufactured fiber" means any fiber derived by a process of manufacture from any substance which, at any point in the manufacturing process, is not a fiber. Nature abounds in fibrous materials, such as cotton, wood, and straw, but only a small number can be used … His field has black soil and the climate is warm. Has no currently accepted medical use in treatment in the United States. Rayon fabrics are soft, smooth, cool, comfortable, and highly absorbent, but they do not always insulate body heat, making them ideal for use in hot and humid climates, although also making their "hand" (feel) cool and sometimes almost slimy to the touch. Each strand is, in turn, made of fibers, all shorter than the piece of yarn that they form. The fabric could be. However, for special activities with toxic hazardous substances the masks can only be used once. A type of fibre obtained naturally from cocoon (4) 6. Starting with a whole grain cereal is a good first step for making sure your meal is high in filling fiber. (b) The fibres which are prepared from chemical substances in industry are called synthetic fibres. Question 17. What do you use for making these wicks? People used to simply drape the fabrics around different parts of their body. Try It! Boojho went to a cloth shop. Cellulose is also found in cotton and linen, but it is the binding power of the lignin that makes a piece of timber much stronger than a bundle of cotton fibres. Beera is a farmer. 1/2 oz (15 grams) Iron per pound (500 grams) fibre. Aramid fibers have inherently poor resistance to ultraviolet radiation. (a) Use of Charkha was popularised by Mahatma Gandhi as a part of the Independence Movement. (a) Cotton (b) Jute (c) Nylon (d) Flax Solution: (c): Nylon is a synthetic fibre manufactured in factories using chemicals while cotton, jute and flax are natural fibres obtained from plants. Wool is also used in making carpets and upholstery. which set of substance are not used in making fibre a-silk,chemicals b- yak hair,camel hair c-husk,bones d-flax,wool experts waiting for your reply - Social Science - Physical Features of India Although the reasons for this are not fully understood, this may be because fibre increases stool size, dilutes content and moves it faster through the gut so the amount of time waste products stay in contact with the bowel is reduced. Synthetic […] Well Challenge Day 5 The Power (and Joy) of Being Prepared. 3.1. 2. Which of the following materials did people use in ancient times for making clothes? Plastic fibers from textiles have been indicated as a major source of this type of contaminant, entering the oceans via wastewater and diverse non-point sources. Like the name suggests, this is a type of fibre made up of glass which is mostly used as a thermal insulator and as a roofing material. If false, correct them. Sinhyu/Getty Images. (d) Cotton yarn on burning gives an odour similar to that of a burning paper. Substance used as synthetic wool (7) 2. The Manufacturing Process of Fiberglass Explain with example. Jute is extensively used for making gunny bags, potato sacks, carpets, curtains, coarse clothes and ropes, etc. When these two substances are combined, thick crystallized “nylon salts” result. Wool is used for making warm clothes, such as sweater, cap, shawl, gloves, and blanket, etc. single strands of material, usually twisted with other filaments to make a thread or fiber. This includes waxes, lignin and polysaccharides such as cellulose and pectin. One such example is given. The process of making fabric by interlacing two sets of 1: Has a high potential for abuse. Fibers taken from the plant leaf or stern are generally used for rope. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 6. Some terms related to fabrics are jumbled up and given below. They are fine, ... most commonly used man-made fibres are Polyester, Nylon, Acrylic, Acetate, Spandex etc. Fibre (fiber in the U.S.) comes exclusively from plants; there is no fibre in meat, fish or animal products (including dairy).Fibre is a complex carbohydrate (type of sugar) but unlike other carbohydrates, which are broken down by the body to provide fuel in the form of glucose, fibre … (b) In India, jute is mainly grown in Kerala and Punjab. The mordant adheres to the fabric and the dye, in turn, adheres to the mordant. She took two pieces and found that one of the pieces were shrinking when it was burnt with a candle. Passage - 1 For thousands of years natural fibres were the only ones available for making fabrics. Most forms of textile materials can be dyed at almost any stage. Natural fiber, hairlike material directly obtained from an animal, vegetable, or mineral source and convertible into nonwoven fabrics such as felt or paper or, after spinning into yarns, woven cloth. We get wool from hair of the sheep, goat, rabbit, yak and camel. Contact allergy has long been recognised as a frequent and potentially disabling problem for consumers and workers. Applications of mineral wool include thermal insulation (as both structural insulation and pipe insulation, though it is not as fire-resistant as high-temperature insulation wool), filtration, soundproofing, and hydroponic growth medium. Their presence is also documented in terrestrial samples. refers to substances not composed primarily of hydrocarbons, that is, hydrogen and carbon. Sometimes they are put through an additional process called texturing. NCERT Exemplar Class 6 Science is very important resource for students preparing for VI Board Examination. Animal fibers include wool, made from sheep hair, and mohair, made from angora goats and rabbits. Of the two, graphite fibres are cheaper and easier to produce than carbon nanotubes. In August 2015, Sweden proposed the skin sensitiser HDDA (hexane-1,6-diol diacrylate) for identification as substance of very high concern (SVHC) according to Article 57(f) of REACH. Workers from factories making synthetic vitreous fibers used in home insulation showed no increased rates of lung problems. How to use used in a sentence. View All Answers (0) Submit Your Answers. One set has an acid group on each end and the other set has an amine group, made up of basic organic compounds, on each end. ___ and ___ are animals fibres. Fibres that are obtained from plants or animals are called natural fibres.Examples are cotton, jute, wool, and silk.Fibres that are made by man from chemical substances are called synthetic fibres.Examples are nylon, rayon, polyester, and acrylic. Fibre has always been the most used for its excellent qualities, as it is the most resistant, absorbent and durable fibre of vegetable origin. Synthetic Fibers. Describe the two main processes of making fabric from yarn. (b) The process of making yarn from fibres is called knitting. Inorganic. 7. 3 Thus, fabrics made from aramid fibers change in color when exposed to ultraviolet radiation. Some examples of synthetic fibres are polyester, nylon and acrylic. Substance used as synthetic wool (7) 2. Boojho with perfect eyesight was finding it difficult to pass a thread through the eye of a needle. But nowadays, synthetic fibres are largely used for clothing and other purposes. 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